Bash script for changing version code and version name in an android manifest.

versionswitch.sh

MANIFEST_FILE='AndroidManifest.xml'
VERSIONCODE=`grep versionCode $MANIFEST_FILE | sed 's/.*versionCode="//;s/".*//'`
VERSIONNAME=`grep versionName $MANIFEST_FILE | sed 's/.*versionName="//;s/\.[0-9]*".*//'`
NEWCODE=$BUILD_NUMBER
NEWNAME=$VERSIONNAME.$BUILD_NUMBER
echo "Updating Android build information. New version code: $NEWCODE - New version name: $NEWNAME";
sed -i 's/versionCode *= *"'$VERSIONCODE'"/versionCode="'$NEWCODE'"/; s/versionName *= *"[^"]*"/versionName="'$NEWNAME'"/' $MANIFEST_FILE

thanks

In case of simpler version

sed -i.bak 's/android:versionName="."/android:versionName="${version_name}"/g' AndroidManifest.xml
sed -i.bak 's/android:versionCode="."/android:versionCode="${BUILD_NUMBER}"/g' AndroidManifest.xml

You need to change the last line to
sed -i '' 's/versionCode = *"'$VERSIONCODE'"/versionCode="'$NEWCODE'"/; s/versionName *= *"[^"]"/versionName="'$NEWNAME'"/' $MANIFEST_FILE

None of the above sed worked!!

Below is the data/file content

versionName 0.0.3

Expected: versionName 0.0.4

Use command:
sed -ie 's/versionName .*/versionName 0.0.4/' "filename"